I don't think hashtable is the correct structure for the data you are trying to store if you are just using a string for the key and a string for the value. In a hashtable, the keys are supposed to be unique for each unique record, but in your post you keep re-using the same keys over and over again. Think of it this way. If I give the hashtable a key, it is supposed to find that key and return to me the associated value. In your example, if I give the key "userNo", what value is the hashtable supposed to return?

Maybe if you describe what you are trying to accomplish, someone will be able to help you design a better structure for your data.

No, sorry, you can not do what you're asking with a hashtable. I tried to describe to you before the way hashtables work. Let's say you try to put the following key/value pairs into hashtable, something like this.